Aja book pages

Little Aja planned to read the book, which has 120 pages, for 4 days. On the first day, she read a quarter of the whole book; on the second day, she had training and therefore only read two-fifteenths of the book; on the third day, she read seven-twentieths of the book. How much of the book will Aja read in three days, and how many pages will she have left on the last day?

Final Answer:

x =  11/15
r =  32

Step-by-step explanation:

$$\begin{gathered} n=120 \\ x=\frac{1}{4}+\frac{2}{15}+\frac{7}{20}=\frac{15}{60}+\frac{8}{60}+\frac{21}{60}=\frac{15+8+21}{60}=\frac{44}{60}=\frac{11}{15}=0.7333 \end{gathered}$$

$$\begin{gathered} X=x\cdot n=\frac{11}{15}\cdot 120=\frac{11\cdot 120}{15}=\frac{1320}{15}=88 \\ r=n-X=120-88=32 \end{gathered}$$

Try another example